Whaaa?! Pin curls (or rag curls, or hair curled with regular old curlers) in just 30 minutes?

Ya. You betcha. 
I found this Lady Sunbeam hair dryer in a Michigan thrift store last year. It was for sale in the Etsy shop for quite awhile, but curiosity got the better of me. 

Look, you can curl your hair while you walk around in your robe and slingbacks, drinking a cup of coffee. As you do. I’m sure it’s not inconvenient at all.

I rag curled my (damp) hair, then lifted the curls up and secured them to my head with bobby pins. Otherwise, they all hang around the same area and can bunch up, which would take longer to dry. The picture below was taken before I pinned up the curls, and of course I forgot to take a picture of what that looks like. Me <—- doofus.

I had a wee bit of trouble with the bonnet…

But I won eventually. Thank goodness it doesn’t look at all ridiculous.

I set the heat level to ‘Low’ and read a book for 30 minutes. I was afraid to use a higher heat setting, fumes from hot plastic were already wafting around after a few minutes on ‘Low.’
After 30 minutes, I took the bonnet off and checked my hair, and it was completely dry. I took out the rags, and my hair looked great – no different from when I do the traditional overnight curls. 

While I can’t say this is something I would do all the time, it’s definitely worth doing. For reference, it takes me 30 minutes to curl my hair with a curling iron, and the curls never last longer than about 45 minutes. So this takes the same amount of time, and the curls lasted all day. 
Lady Sunbeam for the win!